我的BottomNavigationView中有3个项目,我使用以下代码调整了每个项目的大小:
val menuView = bottomNavigation.getChildAt(0) as BottomNavigationMenuView
for (i in 0 until menuView.childCount) {
val iconView = menuView.getChildAt(i).findViewById<View>(android.support.design.R.id.icon)
val layoutParams = iconView.layoutParams
val displayMetrics = resources.displayMetrics
layoutParams.height = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 20f, displayMetrics).toInt()
layoutParams.width = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 20f, displayMetrics).toInt()
iconView.layoutParams = layoutParams
}
现在这个项目不在BottomNavigationView的中心。请帮我把每个项目放在BottomNavigationView的中心用Kotlin方法?
尝试下面的事情
解决方案1
public static void disableShiftMode(BottomNavigationView view) {
BottomNavigationMenuView menuView = (BottomNavigationMenuView) view.getChildAt(0);
try {
Field shiftingMode = menuView.getClass().getDeclaredField("mShiftingMode");
shiftingMode.setAccessible(true);
shiftingMode.setBoolean(menuView, false);
shiftingMode.setAccessible(false);
for (int i = 0; i < menuView.getChildCount(); i++) {
BottomNavigationItemView item = (BottomNavigationItemView) menuView.getChildAt(i);
//noinspection RestrictedApi
item.setShiftingMode(false);
// set once again checked value, so view will be updated
//noinspection RestrictedApi
item.setChecked(item.getItemData().isChecked());
}
} catch (NoSuchFieldException e) {
Log.e("BNVHelper", "Unable to get shift mode field", e);
} catch (IllegalAccessException e) {
Log.e("BNVHelper", "Unable to change value of shift mode", e);
}
}
解决方案2
如果您使用的是最新的支持库,那么您可以使用此解决方案。在xml中添加此行
app:labelVisibilityMode="labeled"
<android.support.design.widget.BottomNavigationView
android:id="@+id/navigation"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="0dp"
android:layout_marginEnd="0dp"
android:background="?android:attr/windowBackground"
app:itemBackground="@drawable/home_bottom_bg_selector"
app:itemIconTint="@color/home_bottom_text_selector"
app:itemTextColor="@color/home_bottom_text_selector"
app:labelVisibilityMode="labeled"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:menu="@menu/navigation" />